The DIY Cardboard Magnetic Sensor Virtual Reality VR Glasses for 4-7" Smartphone makes virtual reality possible and available for every one. With a simple cardboard construction, it offers you an immersive VR experience that you will never forget. And it is easy to assemble; just follow the instructions to fold the cardboard and secure cellphone to the right place with rubber band, then you can look inside to enter a mysterious world it creates. Magnets on two sides let you control the phone conveniently. Click and order now!